.content {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;

  video {
    min-width: 100%;
    min-height: 100%;
    height: auto;
    width: auto;
    position: fixed;
    right: 0;
    bottom: 0;
    z-index: -1;
  }

  .box {
    width: 33%;
    min-width: 450px;
    border-radius: 5px;
    padding: 20px;
    background-color: #f0f0f0cf;
  }
}